fkie_cve-2025-38191
Vulnerability from fkie_nvd
Published
2025-07-04 14:15
Modified
2025-08-09 15:15
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix null pointer dereference in destroy_previous_session If client set ->PreviousSessionId on kerberos session setup stage, NULL pointer dereference error will happen. Since sess->user is not set yet, It can pass the user argument as NULL to destroy_previous_session. sess->user will be set in ksmbd_krb5_authenticate(). So this patch move calling destroy_previous_session() after ksmbd_krb5_authenticate().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/076f1adefb9837977af7ed233883842ddc446644
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0902625a24eea7fdc187faa5d97df244d159dd6e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1193486dffb7432a09f57f5d09049b4d4123538b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/281afc52e2961cd5dd8326ebc9c5bc40904c0468
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7ac5b66acafcc9292fb935d7e03790f2b8b2dc0e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://www.zerodayinitiative.com/advisories/ZDI-25-610/
Impacted products
Vendor Product Version


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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix null pointer dereference in destroy_previous_session\n\nIf client set -\u003ePreviousSessionId on kerberos session setup stage,\nNULL pointer dereference error will happen. Since sess-\u003euser is not\nset yet, It can pass the user argument as NULL to destroy_previous_session.\nsess-\u003euser will be set in ksmbd_krb5_authenticate(). So this patch move\ncalling destroy_previous_session() after ksmbd_krb5_authenticate()."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ksmbd: se corrige la desreferencia de puntero nulo en destroy_previous_session. Si el cliente configura -\u0026gt;PreviousSessionId durante la configuraci\u00f3n de la sesi\u00f3n Kerberos, se producir\u00e1 un error de desreferencia de puntero nulo. Dado que sess-\u0026gt;user a\u00fan no est\u00e1 configurado, se puede pasar el argumento de usuario como nulo a destroy_previous_session. Sess-\u0026gt;user se configurar\u00e1 en ksmbd_krb5_authenticate(). Por lo tanto, este parche modifica la llamada a destroy_previous_session() despu\u00e9s de ksmbd_krb5_authenticate()."
    }
  ],
  "id": "CVE-2025-38191",
  "lastModified": "2025-08-09T15:15:28.460",
  "metrics": {},
  "published": "2025-07-04T14:15:26.157",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/076f1adefb9837977af7ed233883842ddc446644"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0902625a24eea7fdc187faa5d97df244d159dd6e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1193486dffb7432a09f57f5d09049b4d4123538b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/281afc52e2961cd5dd8326ebc9c5bc40904c0468"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7ac5b66acafcc9292fb935d7e03790f2b8b2dc0e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://www.zerodayinitiative.com/advisories/ZDI-25-610/"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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